Related Experiment Videos
Histiocytoid cardiomyopathy of infancy: an unexplained myofibre degeneration
Insights
Histiocytoid cardiomyopathy, a rare heart condition, involves myofiber degeneration in infants. This study details its association with congenital brain malformations and cardiac pre-excitation, highlighting unique cellular changes.
Area of Science:
- Cardiovascular Pathology
- Pediatric Cardiology
- Developmental Biology
Background:
- Investigating rare pediatric cardiac conditions.
- Understanding the etiology of congenital heart abnormalities.
- Characterizing novel histopathological findings in infant hearts.
Observation:
- A 4-month-old female presented with ventricular pre-excitation (Wolff-Parkinson-White syndrome).
- Complex brain malformations including hydrocephalus and ocular anomalies (corneal opacities, microphthalmos) were noted.
- Histopathological examination revealed multifocal myofiber degeneration affecting all heart chambers and the conduction system.
Findings:
- Affected myofibers exhibited a histiocytoid appearance with swollen, vacuolated/granular cytoplasm and rounded nuclei.
- Ultrastructural analysis showed myofibril disruption and significant mitochondrial dilation and disorganization.
- The condition, termed 'histiocytoid cardiomyopathy,' is distinct from lipid-storage disorders.
Implications:
- This case highlights a unique cardiac pathology potentially linked to congenital malformations.
- Further research is needed to elucidate the unknown etiology of histiocytoid cardiomyopathy.
- Understanding this condition may improve diagnosis and management of affected infants.
Abstract:
An unusual multifocal degeneration of the myofibres of all chambers and the conducting system of the heart was found in a 4-month-old female in whom ventricular pre-excitation (Wolff-Parkinson-White syndrome) had been demonstrated. There was a complex malformation of the brain with hydrocephalus and bilateral corneal opacities and microphthalmos. The affected myofibres had a swollen vacuolated or granular cytoplasm and rounded nuclei giving a histiocytoid appearance. Disruption of myofibrils and gross dilation and disorganization of mitochondria were the major fine structural features. Reports of similar lesions in 8 other young female children are reviewed. 'Histiocytoid cardiomyopathy' is the term preferred over others which refer to an increased lipid content. The aetiology is unknown.